THE EFFECT OF HOT DEFORMATION ON THE MICROSTRUCTURE OF AZ91 MAGNESIUM ALLOY

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MALDAR A.R.; EBRAHIMI R.; EBRAHIMI G.R.

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Journal: Journal of Metallurgical and Materials Engineering Year:2011 | Volume:23 | Issue:1 Page(s): 1-10

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Title

THE EFFECT OF HOT DEFORMATION ON THE MICROSTRUCTURE OF AZ91 MAGNESIUM ALLOY

Author(s)

MALDAR A.R. | EBRAHIMI R. | EBRAHIMI G.R. | Issue Writer Certificate

Keywords

MAGNESIUM ALLOY AZ91Q2

DYNAMIC RECRYSTALLIZATIONQ2

β PRECIPITATESQ3

HOT DEFORMATIONQ2

MICROSTRUCTUREQ2

Abstract

Due to the great variety of applications of magnesium alloys with superior mechanical properties, recent studies have been focused on the HOT DEFORMATION behavior and MICROSTRUCTURE of magnesium alloy castings. Although there have been several recent investigations on the MICROSTRUCTURE of wrought magnesium alloys after HOT DEFORMATION, a limited number of studies have been conducted with regard to the evolution of grain structure during hot working processes. The present work examines the microstructural evolution during HOT DEFORMATION of MAGNESIUM ALLOY AZ91. The specimens were hot compressed to the peak strain values of 0.3 and 0.5 at the temperature range of 350 to 425 oC with the strain rate of 0.1 s-1. Structural changes were studied using the optical and scanning electron microscopes. The results showed that the recrystallized grains nucleate along the pre-existing grain boundaries during the compression process. The fraction of dynamically recrystallized grains increased with an increase in the strain value in a sigmoidal way expressed by Avrami equation. The dynamically recrystallized grain size also increased at the beginning with strain, and then decreased after its maximum value being reached.

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APA: Copy

MALDAR, A.R., EBRAHIMI, R., & EBRAHIMI, G.R.. (2011). THE EFFECT OF HOT DEFORMATION ON THE MICROSTRUCTURE OF AZ91 MAGNESIUM ALLOY. JOURNAL OF METALLURGICAL AND MATERIALS ENGINEERING (JOURNAL OF SCHOOL OF ENGINEERING), 23(1), 1-10. SID. https://sid.ir/paper/196054/en

Vancouver: Copy

MALDAR A.R., EBRAHIMI R., EBRAHIMI G.R.. THE EFFECT OF HOT DEFORMATION ON THE MICROSTRUCTURE OF AZ91 MAGNESIUM ALLOY. JOURNAL OF METALLURGICAL AND MATERIALS ENGINEERING (JOURNAL OF SCHOOL OF ENGINEERING)[Internet]. 2011;23(1):1-10. Available from: https://sid.ir/paper/196054/en

IEEE: Copy

A.R. MALDAR, R. EBRAHIMI, and G.R. EBRAHIMI, “THE EFFECT OF HOT DEFORMATION ON THE MICROSTRUCTURE OF AZ91 MAGNESIUM ALLOY,” JOURNAL OF METALLURGICAL AND MATERIALS ENGINEERING (JOURNAL OF SCHOOL OF ENGINEERING), vol. 23, no. 1, pp. 1–10, 2011, [Online]. Available: https://sid.ir/paper/196054/en

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